• Application 1: Line bay in a solidly earthed network, connected to single busbar
switchyard
• Application 2: Line bay in a high impedance earthed network, connected to single
busbar switchyard
• Application 3: Line bay in a solidly earthed network, connected to double busbar
switchyard
• Application 4: Line bay in a high impedance earthed network, connected to
double busbar switchyard
The following application examples, describe transformer bay alternatives:
• Application 5: Transformer bay in a solidly earthed network, connected to single
busbar switchyard
• Application 6: Transformer bay in a solidly earthed network, connected to double
busbar switchyard
• Application 7: Transformer bay in a high impedance earthed network, connected
to single busbar switchyard
2.3.2 Line bay in a solidly earthed network, connected to single
busbar switchyard
3
3
1
REQ650 (A01)/(A11)
Line/Feeder
IEC10000134-1-en.vsd
IEC10000134 V1 EN
Figure 5: Line bay in a solidly earthed network
REQ650 has a number of back-up protection functions. In addition to this, three-phase
trip and autoreclosing is available for REQ650 (A01) and single-phase trip and
autoreclosing is available for REQ650 (A11).
Section 2 1MRK 505 291-UEN A
Application
32
Application manual
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